package com.qf.filter;

import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @author lyx
 * @date 2022/7/7 17:36
 */
@Component
public class Filter1 implements GlobalFilter, Ordered {
    @Override
    public int getOrder() {

        return 1;
    }

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.获取请求对象
        ServerHttpRequest request = exchange.getRequest();

        //获取响应对象
        ServerHttpResponse response = exchange.getResponse();
        String token = request.getHeaders().getFirst("token");
        if(StringUtils.isEmpty(token)){
            //返回异常
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
           return response.setComplete();
        }

        //2.判断获取到的token有没有值   没有值直接返回异常
        System.out.println("------filter1执行了-------------------");
        return chain.filter(exchange);
    }
}
